I've found the best strategy for foiling the beetles, bugs, and vine borers is covering my cukes, melons, and squashes with floating row covers until the plants begin to bloom, when I have to remove the covers to allow pollinators in.
Sadly, that's too late for you this year, Cindy. While there are many chemicals that will control cucumber beetles and squash bugs, including "organic" products such as those containing spinosad http://bit.ly/19pe9gS and pyrethrum http://bit.ly/18JvMZc, like the broad-spectrum synthetic insecticides, they are also toxic to bees and other beneficial insects. It's a tough call when crops are full of flowers.
To help you make up your mind, you may want to consult this fact sheet from the state of Maine on the harm to pollinators from organic-approved pesticides. http://1.usa.gov/177U8Fh
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